Skip to content


tag  jupyter  tips  ai  deep learning  beginner  regression  reinforcement learning  q learning  gym  gymnasium  ardupilot  None  ros2  dds  micro ros  xrce  sitl  plugin  SITL  debug  rangefinder  pymavlink  mavros  gazebo  distance sensor  system_time  timesync  cmake  gtest  ctest  101  cpp  c++  format  fmt  multithreading  spdlog  cyclonedds  eprosima  fastdds  simulation  config  ignition  bridge  sdf  ign-transport  camera  sensors  lidar  aptly  apt  repository  repo  local  mirror  encryption  pgp  docker  container  state  networking  network  nvidia  python  app  devcontainer  gui  tutorial  multi-stage  stage  git  bundle  submodules  github  hooks  pre-commit  lxd  lxc  x11  profile  vscode  marpit  presentation  marp  markdown  mermaid  mkdocs  video  ffmpeg  gstreamer  cheat-sheet  sdp  v4l2loopback  gi  kml  geo  gis  spatial  gdal  ogr  raster  vector  snippets  cheat Sheet  asyncio  future  click  cli  dev container  deb  debian  package  setup  stdeb  project  numpy  template  black  isort  templates  cookiecutter  docs  project document  docstrings  flake8  linter  git-hook  mypy  unittest  pytest  pylint  from a-z  logging  pytest.ini  mock  iterator  generator  yaml  yml  tuple  namedtuple  typing  annotation  typever  pyzmq  zmq  msgpack  action  namespace  remap  control2  ros2_control  effort  velocity  gdb  qos  plugins  msg  node  zero-copy  shm  algorithm  calibration  diff  pid  dev  colcon  colcon_cd  settings  behavior  py_trees  bt  behavior_trees  blackboard  plot  visualization  debugging  diagnostic  DiagnosticTask  diagnostics  tutorials  gst  math  apm  rat_runtime_monitor  bag  rosbag  rosbags  tools  ros  web  rosbridge  vue  binding  discovery  gazebo-classic  launch  spawn  model  cook  gps  imu  ray  gazebo_ros_ray_sensor  ultrsonic  range  ultrasonic  gazebo classic  wrench  odom  ign  gz  xacro  ros_ign  diff_drive  odometry  joint_state  argument  OpaqueFunction  DeclareLaunchArgument  LaunchConfiguration  tmux  nav  slam  test  rclpy  goal abort  cancel goal  action client  action server  custom messages  executor  MultiThreadedExecutor  SingleThreadedExecutor  param  dynamic-reconfigure  service  client  setup.py  package.xml  parameter  parameters  custom  msgs  executers  pub  sub  rqt  rviz  rviz2  pose  marker  tf2  local_setup  rosdep  package manager  project settings  vcstool  urdf  robot_state_publisher  urdf_to_graphiz  joint  link  zenoh  tags  hands on  webinar  cross-compiler  nano  rpi  texture  joints  tmuxp  loop device  rootfs  embedded  zah  linux  rm  ubuntu  sudo  sudoers  nopasswd  visudo  udev  key  gpg  sign  commands  update-alternative  ip  ss  netstat  snap  deploy  ssh  systemd  socat  serial  udp  tc  mtu  select  robotics  path planning  trajectory  speed  kalman_filter  kalman  filter  control  code  extensions  json  schema  docker compose  yocto  poky  qemu  projects  courses to follow  drone  quad  uav  design  vrx  buoyancy 

Linux intro

Table of Content

Linux intro#

with Ubuntu#

O.S Kernel user space#

Linux Kernel and Distributions#

A Linux distribution is an operating system composed of the - Linux kernel - package manager. - applications - display server (GUI)

Ubuntu#

Ubuntu is a Linux distribution based on Debian and composed mostly of free and open-source software. Ubuntu is officially released in three editions: Desktop, Server, and Core for Internet of things devices and robots

Ubuntu versions#

  • Release Every 6 month in (4, 10)
  • LTS Release Every 2 years (20.04, 22.04)

Terminal and BASH#

  • Terminal (emulator) is a GUI to interact with the shell.
  • shell is a program that processes command and return output.
  • BASH: shell scripting language

Root tree#

pwd#

man pwd#

pwd - print name of current/working directory

pwd#

pwd
/home/user

ls#

ls --help
Usage: ls [OPTION]... [FILE]...
List information about the FILEs

man ls#

NAME
       ls - list directory contents

SYNOPSIS
       ls [OPTION]... [FILE]...

DESCRIPTION
       List  information  about the FILEs (the current directory by default).  Sort entries alphabeti‐
       cally if none of -cftuvSUX nor --sort is specified.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
              do not ignore entries starting with .

stdin / stdout / stderr#

  • 0: stdin
  • 1: stdout
  • 2: stderr

w: 500

Filesystem#

Is the way in which files are named and where they are placed logically for storage and retrieval.

  • FAT
  • NTFS
  • EXT4

format#

man mkfs.fat

mkfs.fat - create an MS-DOS FAT filesystem

mkfs.
mkfs.bfs     mkfs.cramfs  mkfs.ext3    mkfs.fat     mkfs.msdos   mkfs.vfat                          
mkfs.btrfs   mkfs.ext2    mkfs.ext4    mkfs.minix   mkfs.ntfs

Folders / Directories#

  • mkdir
  • cd
  • rmdir
  • rm

files and permission#

  • ls
  • ll
  • ls -lah
  • cp
  • rm

files permission and owner#

  • chown
  • chmod

left:50% w:500 bg right:50% h:200